17.8*37-178.4*1.9+17.84*82用简便算法计算

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17.8*37-178.4*1.9+17.84*82用简便算法计算

17.8*37-178.4*1.9+17.84*82用简便算法计算
17.8*37-178.4*1.9+17.84*82用简便算法计算

17.8*37-178.4*1.9+17.84*82用简便算法计算
17.8*37-178.4*1.9+17.84*82
=17.84x(37-10x1.9+82)
=17.84x100
=1784

原式=17.8(37-19+82)
=17.8*100
=1780

你的题应是:
17.84*37-178.4*1.9+17.84*82
=17.84*37-17.84*19+17.84*82
=17.84*(37-19+82)
=17.84*100
=1784